Hay-derrick.



No. 678,393. Patented July 16, MN. J. GEERY. HAY DERRICK.

(Apphcahon filed Nov. 30, 1900.) (lo Modal.) 2 Sheets-Sheet l.

I um N0. 678,393. Patented luly l6, IQOL J. GEERY.

I HAY DERRICK. (Applicntion fllo d Nov. 30, 1900' 2 Sheets-Shaat 2.

(No Model.)

Jug: nonms Incas no vuoroun UNITED STATES PATENT OFFICE.

JAMES GEERY, OF LANCASTER, MISSOURI. I

HAY-DERRICK.

SPECIFICATION forming part of Letters Patent No. 678,393, dated July 16, 1901.

Application filed November 30, 1900. Serial No. 38,208. (No model.)

To all whom it may concern:

Be it known that I, JAMES GEERY, a citizen of the United States, residing at Lancaster, in the county of Schuyler and State of Missouri, have invented a new and useful Hay Derrick, of which the following is a specification.

' My invention relates to an improvement in hay-derricks, and is an improvement upon'the hay-derrick described in Letters Patent of the United States granted to James R. Buford and James Geery April 24, 1894., No. 518,584.

The object of my present invention is to provide means for relieving the swinging der rick-arm of transverse stress and to apply the stress resulting from the lifting of the load to the said derrick-arm longitudinally of the latter, thereby greatly strengthening the derrick-arm and entirely relieving the same of breaking strain.

My invention consists in the peculiar construction and combination of devices hereinafter fully set forth and claimed.

In the accompanying drawings, Figure 1 is a perspective view of a hay-derrick embodying my improvements. Fig. 2 is an elevation of the same, partly in section.

The sled-frame'which supports the hay-derrick and adapts the same to be readily drawn from one point to another comprises the pairs of runners 1, the cross-bars 2, connecting the same and disposed near the ends thereof, and the central cross-bar 3. A bearing 4 is supported above the center of the sled-frame by inclined standards 5and tie-rods 6'.

The vertical standard 7 of the derrick revolves in the bearing 4 and has its lower end stepped in a bearing-plate 8, secured on the center of the cross-bar 3. The upper end of the said standard 7 is provided with an open slot 9. The derrick-arm 10 is secured in the upper portion of the said slot and is braced near its ends by the brace-arms 11 12, the lower ends of which are secured to the standard 7 by plates 13, as shown. Said bracearms 11 12 are connected together by a brace-bar 14, which is-disposed parallel with the derrick-arm 10 and extends through the said slot 9, the said brace bar being bolted to the brace-arms 11 12 and to the standard, as shown. rick-arm is suspended a block 15. A block From the outer upper end of the der- 16 is secured to the central cross-bar 3 of the said frame. On the derrick-arm, near the lower end thereof, is a truss-lever 17, which is fulcrumed on a bolt'lS. The arm 19 of said truss-l'everis disposed above the derrickarm 10 and projects slightly to the rear thereof. A truss-rod 20 connects the inner end of the truss-lever to the derrick-arm at a point near the upper outer end of the latter. A suitable keeper 21 is secured on the lower rear end of the derrick-arm. A block 22 is suspended from the outer end of arm 19 of the truss-lever 17. The hoisting-rope 23, which is employed for raising the hay-fork 24 when loaded, engages the blocks 16, 22, and

15, as shown, and is operated in the usual way.

It will be observed by reference to the drawings that when a load is raised by the rope 23 and fork 24 the truss-lever, to which the block 22 is attached, is depressed by the stress exerted thereon, thereby drawing inwardly on the truss-rod 20 and exertinga lifting stress upon the outer upper end of the derrick-arm, thereby bracing the latter at the outer end, and, moreover, the stress which is exerted from the fulcrum of the truss-lever 17 on the inner lower portion of the derrick-arm is longitudinal of the derrick-arm and not at right angles thereto, as would be the case if the block 22 were attached directly to said derrick-arm. Hence the derrick-arm is practically relieved of breaking stress and the efiiciency of the hay-derrick very greatly increased. Furthermore, the truss lever and rod by exerting a lifting stress on the outer upper end of the derrick arm tend to equalize the downward pressure on the ends of the derrick-arm and obviate the tendency of the load to overturn the derrick;

Having thus described my invention, I claim' 1. In a hay-derrick the combination of the derrick-arm the block suspended from the outer end thereof, a truss-lever on the inner end of said derrick-arm, a truss-rod connecting said truss-lever to the saidderrick-arm at or near the outer end of the latter, ablock suspended from the said truss-lever and an elevating-rope passing over said blocks, for the purpose set forth, substantially as de scribed.

2. In a hay-derrick the combination of the derrick-arm, the block suspended from the outer end thereof, a truss-lever on the inner portion of the said derrick-arm above the same and having the arm 19 projecting beyond the inner end of the derrick-arm, a block supported by said arm 19 and a truss-rod connecting the inner end of said truss-lever to the said derrick-arm at a point at or near the outer end of the latter, substantially as de- 10 scribed.

In testimony that I claim the foregoing as my own I have hereto atfixed my signature in the presence of two Witnesses.

JAMES GEERY.

Witnesses:

RoBT. W. BRIGGS, T. G. NEELEY. 

